Collar-buster structure



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P. DIETRICH COLLAR BUSTER STRUCTURE Original Filed Sept- 16', 1924 g? I f zv v x ww Patented Feb. 5, 1929.

' UNITED STATES P A E-NT}50mm PAUL DIETBICH, or WEBB cI'rY, OKLAHOMA.

COLLAR-BUSTER STRUCTURE.

original applic'ation filed September 10, weasel-i811 No. 738,099. Divided and this application filed November 18, 1926.

The present invention relates to deep well tools and more particularly to a'casing tool whereby the same may be cut when required, said tool being constructed to slip over themain pipe passing through the casing thereb 7 reventinp' the tool from stickin in the:

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well and causing trouble when removing the casing.

The invention furthermore provides a 'tool which will Operate equally well upon being jarred upwardly or downwardly when cutting a collar to admit of the casing being removed in sections.

This application is a division of that filed by me on September 16, 1924, Serial Numberv 788,099, now issued as Patent No. 1,628,533, for a combined collarbuster and easing spear. Other objects and advantages will be ap parent and suggest themselves as the nature of the invention is understood.

While the drawings illustrate an embodiment of the invention it is to be understood that in adapting thesame to meet difierent conditions and requirements, various changes in the form, proportion and minor details of construction may be resorted to without departing from the nature of the invention.

Referring to the accompanying drawings forming a part of the specification, Figure 1 is a vertical central sectional view of a well tool embodying the invention, and

Figure2 is a cross sectional view taken on the line 2 2 of Figure 1.

Corresponding-and like arts are to in the following description and designated in bothviews of the drawing by like reference characters.

The numeral 10 designates the casing or upper enlarged pipe section of an oil well and 11 the smaller pipe passing therethrough the well so that the tool may be slipped there over when lowered into the well for use as a collar buster by being jarred upwardly or downwardly. The opening 15 is disposed to referred Serial No.- 149,174.

body 13 as by a removable element indicatedi at 28 and is reversible so that it may be arranged to incline outwardly and downs wardly as indicated by the full lines in Fig-' 'ure 3 or upwardly and outwardly as designated by the dotted lines in said figure, the

active end of the bit being tapered to a chisel edge so as to cut a collar 12 of the casing when it is required to separate the latter into sections to facilitate its removal. A spring 29 normally urges the active end of the bit 27 outwardly so as'to engage and cutthe collar when the tool is jarred upwardly or downwardly according to the arrangement of the bitand the adaptation of the tool to operate by an upward or a downward jar. The pivot pin 28 for the bit'is removable and adapted to be inserted through an upper or a. lower opening 30 intersecting the opening 24.

(It is to be noted that the bit 27 cannot assume a horizontal position when within the pipe 10 so that thrust of the tool in either direction, according to the angle of the tool I 12 and cut it.

7 What is claimed is i. 1. A well tool adapted to the casing and comprising a tubular body to slip3 over the inner pipe, the bore of said body eing'eccentric to provide a relatively thick portion, and means fitted 'to the said body at the said portion thereof wherebyto adapt'the tool foruse as a collar buster, the, collar busting means being reversible to admit of operation of the tool either by an upward or a downward jar. I

2. A well tool adapted to be lowered into a well casing, comprising a tubular body to slip overa well tube in said casing, a cutting element carried by said body and incapa ble of'assuming'a horizontal position while within the casing, so that it w ll assume an inclined position when moved and thus opbe lowered into 27 will cause the latter to engage the element eratively engage the casing and means removably fastening said cutting element to the tool to permit reversal thereof to enable operation of the tool either by an upward or a downward jar.

3. A Well tool adapted to be lowered into a Well casing, COI'HIJIlSlII f a tubular body to slip over a Well tube in said casing, a cutting element carried by said body and incapable 10 of assuming a horizontal position While Within the casing so that it Will assume an inclined position when moved and thusoperatively engage the casing, said body having a slot, and said cutting element being removably pivoted at one end and Within said slot to permit reversal thereof to enableoperation of the tool either by an upward or a downward ar.

In testimony whereof I affix my signature.

' :PAUL .DIETRICH. 

